Zoho Mail in Firefox 4 as an Application Tab

Zoho Mail in Firefox 4 as an Application Tab

Hi,

Yesterday I started to use Firefox 4.
I noticed that they have this nice feature called "Application Tab": you can set some tab as "Application Tabs" to have them always active in every browser window.

I tried this feature with Zoho Mail but I noticed that it doesn't work well: I can't see when there are new messages in the inbox. Also fetching emails manually nothing changes in the inbox.
If I refresh the entire page it works properly.

Please help me to resolve this issue.

Thanks,
Giordano